Adult brown booby (Sula leucogaster), on post on the northeast coast of Viti Levu, Fiji, South Pacific, Pacific

Two juvenile brown pelicans (Pelecanus occidentalis) behind an adult in the lower Gulf of California (Sea of Cortez), Mexico. Note the uniform drab brown coloration of the juvenile plumage.

Juvenile brown pelican (Pelecanus occidentalis) in the lower Gulf of California (Sea of Cortez), Mexico. Note the uniform drab brown coloration of the juvenile plumage.

First summer coloration Bonaparte's gull (Larus philadelphia) in the calm waters of Takatz Bay on Baranof Island in Southeastern Alaska, USA. Pacific Ocean.

First summer coloration Bonaparte's gull (Larus philadelphia) in the calm waters of Takatz Bay on Baranof Island in Southeastern Alaska, USA. Pacific Ocean.